Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 17, Issue 17, Pages 4796-4801Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201002154
Keywords
cluster compounds; mixed-valent compounds; molybdenum; polyoxometalates; reduction
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Funding
- NSFC [20871073]
- THSJZ
- Tsinghua SRT program
- Chinese Postdoctoral Science Foundation (CPSF) [CPSF 023260204]
- Tsinghua University Postdoctoral Science Foundation (TUPSF) [023160204]
- Tsinghua University Initiative Foundation [20101081771]
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The first mixed-valent octamolybdate anion [(Mo4Mo4O24)-Mo-V-O-VI](4-), termed chi-octamolybdate due to its shape, was obtained by partial reduction of alpha-(Bu4N)(4)-[Mo8O26] in dry acetonitrile. Single-crystal X-ray structure analysis revealed that the anion includes an unusual (Mo4O8)-O-V cubane-like cluster core, whose four side faces are capped by four MoO4 units to form a crosslike cluster. X-ray photoelectron spectroscopy (XPS) and bond valence sum (BVS) calculations were carried out to validate the presence of mixed-valent Mo centers.
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